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All Journal Jurnal Teknik Mesin Journal of Material Processing and Characterization (JMPC)
Lilik Dwi Setyana
Program Studi Diploma Jurusan Teknik Mesin, Universitas Gadjah Mada Yogyakarta
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Kadar TiO2 Terhadap Kekuatan Bending Komposit Serbuk Al/TiO2 Lilik Dwi Setyana; Toto Rusianto
Jurnal Teknik Mesin Vol. 7 No. 1 (2005): APRIL 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

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Abstract

Aluminum fine powder as the matrix and TiO2 as the reinforcement is known as Al/metal matrix composite, that can be produced by powder metallurgy. The research of Al/TiO2 MMC with various content of reinforcement was 0, 2, 4, 6 and 8% weight of TiO2. Green body was produced with variuos compacting pressures 400 and 500 MPa, then sintered at 550 oC for 5 hour. Optical and SEM were used to observe the microstructures. Mechanical properties of the specimens including Brinell hardness and modulus of rupture by four point bending. The results of the research show that Brinell hardness number, modulus of rupture and density of composites increases with increasing compacting pressure. The optimum properties were achieved on the composites containing 4% weight of TiO2 were modulus of rupture was 82 kg/mm2, hardness was 42 BHN and density 2.57 gr/cm3 with compacting pressure of 500 MPa. Abstract in Bahasa Indonesia : Aluminium serbuk sebagai matrik dan TiO2 sebagai penguat dikenal sebagai bahan komposit matrik logam (MMC), yang dapat diproduksi dengan teknik metalurgi serbuk. Dalam penelitian ini komposit Al/TiO2 dengan variasi penambahan unsur penguat sebesar 0, 2, 4, 6 dan 8% berat TiO2. Pembentukan green body dengan tekanan kompaksi 400 dan 500 MPa, dan proses sinter pada suhu 550 OC selama 2 jam. Pengujian meliputi uji bending dan kekerasan brinell, pengamatan srtuktur mikro menggunakan SEM dan mikroskop optik. Hasil penelitian menunjukan kekerasan dan kekuatan bending meningkat dengan meningkatnya tekanan kompaksi. Komposisi optimum dicapai pada komposisi Al/TiO2 4% berat, dengan kekuatan bending sebesar 82 kg/mm2 dan kekerasan 42 BHN pada pembentukan dengan tekanan kompaksi 500 MPa. Kata kunci: metalurgi serbuk, Al/TiO2, Komposit.
The Improvement of Wear and Impact Resistance of High Chromium White Cast Iron for Crusher Ridho Sabdo Prayogo; Lilik Dwi Setyana
Journal of Material Processing and Characterization Vol 1, No 2 (2020): Articles
Publisher : Departmen Teknik Mesin dan Industri, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (571.495 KB) | DOI: 10.22146/jmpc.68282

Abstract

Crusher is a component of heavy equipment used to break rocks or solid materials into a needed size. Crusher that is made of high chromium white cast iron will endure friction and impact forces. The quality improvement of the crusher is needed for enduring its service life. This research is conducted to determine the influence of heat treatment on the wear and impact resistance of the crusher. The material used in this research was high chromium white cast iron with some main compositions such as 18.5%wt Cr, 2.1%wt C, and 2.8%wt Ni. The heat treatment carried out was austenitization at a temperature of 1000ºC, followed by the quenching, quenching-tempering, normalizing, and annealing process. The tests carried out for the characterization of mechanical properties were Vickers hardness, impact, and wear rate. Meanwhile, observation was conducted to examine the microstructure of the specimen. Based on the observations, the microstructure of the specimen is dominated by M7C3 eutectic carbide, retained austenite and martensite. The highest hardness of the high chromium white cast iron (788 VHN) is a specimen with austenitizing-quenching (up 16% compared to normalizing specimens) and gradually decreases (up to 12%) after the 450ºC tempering. The highest wear resistance (8.1E-6 mm³/kg.m) is the specimen with tempering at 450ºC. The highest impact strength (0.055 J/mm²) occurs in the normalizing process. Hence, the heat treatment that can produce optimal properties to be applied in the crusher is tempering with the temperature of 450ºC.
Co-Authors Ridho Sabdo Prayogo Toto Rusianto